<%@ page language="java" contentType="text/html; charset=utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>显示代数和</title>
</head>
<body>
代数和为非负整数<h1>
<s:property value="sum"/>
</h1>
Session Test: ${sessionScope.his}

</body>
</html>